An approach to visual interaction analysis of urban spaces. Central Barcelona as a case study

Clúa, Alvaro; Crosas, Carles; Parcerisa, Josep Padró i

doi:10.1080/17549175.2021.1886972

Cited by 4 publications

(4 citation statements)

References 20 publications

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“…Visibility graph analysis (VGA) is applied in many indoor and outdoor environments to predict the volume of pedestrians (Parvin et al, 2008) and to understand the relationship between permeability and social activities in outdoor in-between spaces (Zerouati and Bellal, 2020). VGA has been developed by new approaches such as a continuous stochastic analysis that includes measures of connectivity, covisibility, compactness, and occlusivity (Psarra and McElhinney, 2014); the mapping of the visual clustering coefficient, which is one of the parameters derived from the VGA of isovists (Clua et al, 2022); and finally, the model of three-dimensional visual relations (Culagovski et al, 2014;Varoudis and Psarra, 2014), which is different from what can be done on planar surfaces.…”

Section: Literature Reviewmentioning

confidence: 99%

The Impact of Passages on Street Connectivity in Commercial Areas: the case of Besiktas market area in Istanbul

Yildiz Ozkan,

Cekmis

2024

ACE: Architecture, City and Environment

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Els passatges, entesos com una tipologia constructiva important i convencional del teixit urbà estan a punt de desaparèixer a les actuals ciutats globalitzades. Investigacions prèvies assumeixen teòricament que els passatges faciliten el flux continu als espais públics, afavoreixen l’accessibilitat i milloren la vitalitat del carrer. Tot i això, no hi ha evidència suficient que demostri el seu potencial millorant la connectivitat dels espais. Aquest estudi té com a objectiu investigar com els passatges afecten físicament i visualment la connectivitat dels carrers i, per tant, com milloren la integració espacial a les xarxes d’aquests. L’estudi de camp es va dur a terme a petita escala a l’àrea d’un mercat comercial on hi ha molts passatges interconnectats. La metodologia utilitzada combina una anàlisi gràfica visual, axial i segmentària de la sintaxi espacial; amb una observació sistemàtica del volum de vianants i les opcions de ruta. Les nostres troballes suggereixen que els passatges augmenten tant la connectivitat física i visual com la integració espacial en proporcionar moltes rutes diverses, curtes i alternatives per al moviment dins de la xarxa de carrers. Tot i això, les troballes també van mostrar que l’ús efectiu dels passatges està predominantment associat a alguns dels seus atributs espacials. En aquest sentit, sempre que els passatges tinguin corredors curts i directes que proporcionen connexions en diferents direccions, contribuiran a l’accessibilitat dels carrers i a la vitalitat de les ciutats. Passages, an important and conventional building typology of the urban fabric, are about to disappear in today's globalized cities. Previous research theoretically assumes that passages allow continuous flow of public spaces, support accessibility, and enhance street vitality. However, there is not enough evidence to provide their potential for improving connectivity. This study aims to investigate how passages affect street connectivity physically and visually and thus how they improve spatial integration in street networks. The field study was conducted in a small-scale commercial market area, in which there are many interconnected passages. The methodology consists of axial, segment and visibility graph analyzes of space syntax, and a systematic observation of pedestrian volume and route choices. Our findings suggest that passages increase physical and visual connectivity and spatial integration by providing many diverse, short, and alternative routes for movement within the street network. However, the findings also showed that the effective use of the passages is predominantly associated with their spatial attributes. As long as passages have short and direct corridors, providing connections in different directions, they can contribute to the accessibility of streets and the vitality of cities. Los pasajes, entendidos como una tipología constructiva importante y convencional del tejido urbano están a punto de desaparecer en las actuales ciudades globalizadas. Investigaciones previas asumen teóricamente que los pasajes facilitan el flujo continuo en los espacios públicos, favorecen la accesibilidad y mejoran la vitalidad de la calle. Sin embargo, no hay evidencia suficiente que demuestre su potencial mejorando la conectividad de los espacios. Este estudio tiene como objetivo investigar cómo los pasajes afectan física y visualmente a la conectividad de las calles y, por lo tanto, cómo mejoran la integración espacial en las redes de las mismas. El estudio de campo se llevó a cabo a pequeña escala en el área de un mercado comercial en el que hay muchos pasajes interconectados. La metodología utilizada combina un análisis gráfico visual, axial y segmentario de la sintaxis espacial; con una observación sistemática del volumen de peatones y las opciones de ruta. Nuestros hallazgos sugieren que los pasajes aumentan tanto la conectividad física y visual como la integración espacial al proporcionar muchas rutas diversas, cortas y alternativas para el movimiento dentro de la red de calles. No obstante, los hallazgos también mostraron que el uso efectivo de los pasajes está predominantemente asociado a algunos de sus atributos espaciales. En este sentido, siempre que los pasajes cuenten con corredores cortos y directos que proporcionan conexiones en diferentes direcciones, contribuirán a la accesibilidad de las calles y a la vitalidad de las ciudades.

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Section: Literature Reviewmentioning

confidence: 99%

The Impact of Passages on Street Connectivity in Commercial Areas: the case of Besiktas market area in Istanbul

Yildiz Ozkan,

Cekmis

2024

ACE: Architecture, City and Environment

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“…Regarding Barcelona, two groups of contributions have been basic references to frame the analysis: (1) studies on perception in the street layout of Barcelona, which provide interpretations of the visual and perceptive proximity in public space [57]; and (2), research that analyses the general logics of retail in Barcelona [7,33]. In addition, recent research related to the energy consumption of the terraces in the city, has been of great relevance for this article [32].…”

Section: Two Looks At the Terraces In Barcelona: Before And After The...mentioning

confidence: 99%

Outdoor Terraces in Barcelona and Milan: Configuration of New Spaces for Social Interaction

2022

Self Cite

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This work approaches the phenomenon of the outdoor terraces of bars and restaurants, analysing the role of these privately owned collective elements whose layout has shaped the urban landscape at the pavement level for more than a century, and whose presence has become essential in the streets of many cities after a pandemic. The research highlights the interest of terraces as dynamic elements of urbanity: private domains in the public space where people eat collectively; they are apparently simple units that synthesise complex conflicts between individual behaviours and property boundary conditions. The investigation shows the increasing expansion that outdoor terraces have experienced since 2020, using the cities of Barcelona and Milan as case studies. A series of GIS maps show the image of both cities before and after the pandemic, allowing us to evaluate the amount of public space allocated to terraces, measure their increase in number and surface, establish the proportions of occupation of the street and find the patterns of concentration in the public space. Finally, the article offers some policy and planning recommendations based on the research findings.

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“…Along the same line, it is worth highlighting some aspects of the “Aire / Air” project ( https://air.300000.eu Accessed 13 February 2023 ), on air quality in Barcelona and, more specifically, the differentiation of street sections according to this variable. Also noteworthy are the studies on the visual perception of public spaces in central Barcelona using visual graph analysis [ 42 ] or other works digging into the relationship between the spatial configuration of Ciutat Vella and the acoustics from music street performances [ 43 ]. Finally, the modeling of the network has also been the basis of a number of recent Barcelona-centered research, including studies on the distribution of proximity retail [ 44 ]; the location of terraces of restaurants and bars in public spaces [ 45 ], or social media in public spaces [ 46 ].…”

Section: Introductionmentioning

confidence: 99%

Modeling Barcelona sidewalks: A high resolution urban scale assessment of the geometric attributes of the walkable network

Dalmau¹,

Uceda²

2023

PLoS ONE

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Within the framework of urban pedestrian networks, this paper presents a method of modeling the street network from the perspective of foot traffic, beyond the vehicle-focused street centerline representation approach in transportation research. A scalable method to extract the centerlines of the complete walkable urban area from its polygon representation at a one-meter resolution is discussed, using open-source tools. To evaluate the betweenness centrality in a spatially directed graph, the process is applied to the study of the ‘walkable Barcelona’, focusing on three key parameters: 1) the street width, 2) the longitudinal slope, and 3) the crosswalks connecting the sidewalk platforms. The results identify the uneven distribution of these parameters within a complex urban fabric, and the high-resolution cartography allows the identification of critical areas within the network, introducing future lines of research and applications of the workflow. This is especially relevant considering the increasing awareness of citizens and the urban agendas worldwide, aimed at improving and widening the sidewalk infrastructure that supports local activity in cities.

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An approach to visual interaction analysis of urban spaces. Central Barcelona as a case study

Cited by 4 publications

References 20 publications

The Impact of Passages on Street Connectivity in Commercial Areas: the case of Besiktas market area in Istanbul

The Impact of Passages on Street Connectivity in Commercial Areas: the case of Besiktas market area in Istanbul

Outdoor Terraces in Barcelona and Milan: Configuration of New Spaces for Social Interaction

Modeling Barcelona sidewalks: A high resolution urban scale assessment of the geometric attributes of the walkable network

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